Please accept my resignation from ______________ [FIRM/Company, ex. XYZ Inc.], to be effective on ___________ [DATE, ex. March 11, 2016]. I regret that my current state of health impedes me from discharging my duties and providing the firm with the quality of service I have been able to in the past.

I would like to take this opportunity to mention that my employment here has been thoroughly gratifying and rewarding. I wish the firm success in the future and I am sincerely proud to have had the opportunity to be with ____________ [FIRM/Company, ex. XYZ Inc.] for ___________ [DURATION, ex. two years].